Here's how I'd price things and be ready to deal.
Belt Sander $200
Planer if it's powered $500
Planer if it's run by the Shopsmith $400
Basic Shopsmith unit with all parts $500
Dust Collector $300
1986 510, jointer, bandsaw, belt sander, scroll saw, jigsaw and lots of accessories. Shopsmith woodworking bench too!